1/* 2 * clock2xxx.c - OMAP2xxx-specific clock integration code 3 * 4 * Copyright (C) 2005-2008 Texas Instruments, Inc. 5 * Copyright (C) 2004-2010 Nokia Corporation 6 * 7 * Contacts: 8 * Richard Woodruff <r-woodruff2@ti.com> 9 * Paul Walmsley 10 * 11 * Based on earlier work by Tuukka Tikkanen, Tony Lindgren, 12 * Gordon McNutt and RidgeRun, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 */ 18#undef DEBUG 19 20#include <linux/kernel.h> 21#include <linux/errno.h> 22#include <linux/clk.h> 23#include <linux/io.h> 24 25#include <plat/cpu.h> 26#include <plat/clock.h> 27 28#include "clock.h" 29#include "clock2xxx.h" 30#include "cm.h" 31#include "cm-regbits-24xx.h" 32 33struct clk *vclk, *sclk, *dclk; 34 35/* 36 * Omap24xx specific clock functions 37 */ 38 39/* 40 * Set clocks for bypass mode for reboot to work. 41 */ 42void omap2xxx_clk_prepare_for_reboot(void) 43{ 44 u32 rate; 45 46 if (vclk == NULL || sclk == NULL) 47 return; 48 49 rate = clk_get_rate(sclk); 50 clk_set_rate(vclk, rate); 51} 52 53/* 54 * Switch the MPU rate if specified on cmdline. We cannot do this 55 * early until cmdline is parsed. XXX This should be removed from the 56 * clock code and handled by the OPP layer code in the near future. 57 */ 58static int __init omap2xxx_clk_arch_init(void) 59{ 60 int ret; 61 62 if (!cpu_is_omap24xx()) 63 return 0; 64 65 ret = omap2_clk_switch_mpurate_at_boot("virt_prcm_set"); 66 if (!ret) 67 omap2_clk_print_new_rates("sys_ck", "dpll_ck", "mpu_ck"); 68 69 return ret; 70} 71 72arch_initcall(omap2xxx_clk_arch_init); 73 74 75